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  <main id="main" class="col-md-9"><div class="page-header">
      <img src="../logo.svg" class="logo" alt=""><h1>map_headernames provides metadata about all indicators in EJAM/EJScreen</h1>
      <small class="dont-index">Source: <a href="https://github.com/USEPA/EJAM/blob/HEAD/R/data_map_headernames.R" class="external-link"><code>R/data_map_headernames.R</code></a></small>
      <div class="d-none name"><code>map_headernames.Rd</code></div>
    </div>

    <div class="ref-description section level2">
    <p>map_headernames provides metadata about all indicators in EJAM/EJScreen</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="va">map_headernames</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="format">Format<a class="anchor" aria-label="anchor" href="#format"></a></h2>
    <p>An object of class <code>data.frame</code> with 635 rows and 76 columns.</p>
    </div>
    <div class="section level2">
    <h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
    <p>This is an IMPORTANT TABLE that provides information about each variable (indicator), such as the following:</p><ul><li><p>names as used in geodatabase files (original data source)</p></li>
<li><p>names as used in the outputs of the EJScreen API</p></li>
<li><p>names as used in the R code</p></li>
<li><p>names as used in short labels of graphics</p></li>
<li><p>names as used in table headers (long versions to provide full descriptions of the variables)</p></li>
<li><p>category of variable, for purposes of grouping similar ones like those in names_d or names_d_pctile</p></li>
<li><p>info about rounding decimal places, significant digits, percentage format, etc.</p></li>
<li><p>method for aggregating the value across blockgroups (sum, weighted mean, what is the weight, etc.)</p></li>
<li><p>etc.</p></li>
</ul><p>It was created from a spreadsheet of the same name, that is in a data-raw folder. Several helper functions are used to query it such as <code><a href="fixcolnames.html">fixcolnames()</a></code> and many functions rely on it. You can see examples of what it contains like this, for example:</p>
<p><code>data.frame(t(map_headernames[1:2, ]))</code></p>
    </div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p><code><a href="varinfo.html">varinfo()</a></code> <code><a href="fixcolnames.html">fixcolnames()</a></code> <code><a href="varin_map_headernames.html">varin_map_headernames()</a></code> <code><a href="namesbyvarlist.html">varlist2names()</a></code></p></div>
    </div>

    <div class="section level2">
    <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span>  <span class="co">#   See how many variables are on each list, for example: </span></span>
<span>  <span class="kw">if</span> <span class="op">(</span><span class="cn">FALSE</span><span class="op">)</span> <span class="op">{</span> <span class="co"># \dontrun{</span></span>
<span>  <span class="fu">data.table</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/pkg/data.table/man/setDT.html" class="external-link">setDT</a></span><span class="op">(</span><span class="fu">copy</span><span class="op">(</span><span class="va">map_headernames</span><span class="op">)</span><span class="op">)</span><span class="op">[</span>, <span class="fu">.</span><span class="op">(</span></span>
<span>    variables <span class="op">=</span> <span class="va">.N</span>, </span>
<span>    has_apiname <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/sum.html" class="external-link">sum</a></span><span class="op">(</span><span class="va">apiname</span> <span class="op">!=</span> <span class="st">""</span><span class="op">)</span>, </span>
<span>    has_csvname <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/sum.html" class="external-link">sum</a></span><span class="op">(</span><span class="va">csvname</span> <span class="op">!=</span> <span class="st">""</span><span class="op">)</span>, </span>
<span>    has_acsname <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/sum.html" class="external-link">sum</a></span><span class="op">(</span><span class="va">acsname</span> <span class="op">!=</span> <span class="st">""</span><span class="op">)</span></span>
<span>    <span class="op">)</span>, </span>
<span> keyby <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"raw_pctile_avg"</span>, <span class="st">"DEJ"</span>, <span class="st">"ratio.to"</span>, <span class="st">"pctile."</span>, <span class="st">"avg."</span>,  <span class="st">"varlist"</span> <span class="op">)</span><span class="op">]</span></span>
<span>  </span>
<span> <span class="co"># Which sources provide which key variables or indicators? </span></span>
<span> </span>
<span> <span class="va">some</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/unique.html" class="external-link">unique</a></span><span class="op">(</span><span class="va">map_headernames</span><span class="op">$</span><span class="va">rname</span><span class="op">[</span><span class="va">map_headernames</span><span class="op">$</span><span class="va">varlist</span> <span class="op">!=</span> <span class="st">""</span> </span>
<span>   <span class="op">&amp;</span> <span class="va">map_headernames</span><span class="op">$</span><span class="va">varlist</span> <span class="op">!=</span> <span class="st">"x_anyother"</span><span class="op">]</span><span class="op">)</span></span>
<span> </span>
<span> <span class="va">info</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/cbind.html" class="external-link">cbind</a></span><span class="op">(</span></span>
<span>   <span class="fu"><a href="varinfo.html">varinfo</a></span><span class="op">(</span><span class="va">some</span>, info <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">'api'</span>, <span class="st">'csv'</span>, <span class="st">'acs'</span>, <span class="st">'varlist'</span><span class="op">)</span><span class="op">)</span>, </span>
<span>   usastats <span class="op">=</span> <span class="va">some</span> <span class="op"><a href="https://rdrr.io/r/base/match.html" class="external-link">%in%</a></span> <span class="fu"><a href="https://rdrr.io/r/base/names.html" class="external-link">names</a></span><span class="op">(</span><span class="va">usastats</span><span class="op">)</span>, </span>
<span>   statestats <span class="op">=</span> <span class="va">some</span> <span class="op"><a href="https://rdrr.io/r/base/match.html" class="external-link">%in%</a></span> <span class="fu"><a href="https://rdrr.io/r/base/names.html" class="external-link">names</a></span><span class="op">(</span><span class="va">statestats</span><span class="op">)</span><span class="op">)</span></span>
<span> <span class="va">info</span> <span class="op">&lt;-</span> <span class="va">info</span><span class="op">[</span><span class="fu"><a href="https://rdrr.io/r/base/nchar.html" class="external-link">nchar</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/paste.html" class="external-link">paste0</a></span><span class="op">(</span><span class="va">info</span><span class="op">$</span><span class="va">api</span>, <span class="va">info</span><span class="op">$</span><span class="va">csv</span>, <span class="va">info</span><span class="op">$</span><span class="va">acs</span><span class="op">)</span><span class="op">)</span> <span class="op">&gt;</span> <span class="fl">0</span>, <span class="op">]</span></span>
<span> <span class="va">info</span></span>
<span> </span>
<span> <span class="co"># any others</span></span>
<span> </span>
<span> <span class="va">some</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/unique.html" class="external-link">unique</a></span><span class="op">(</span><span class="va">map_headernames</span><span class="op">$</span><span class="va">rname</span><span class="op">[</span><span class="va">map_headernames</span><span class="op">$</span><span class="va">varlist</span> <span class="op">!=</span> <span class="st">""</span> </span>
<span>   <span class="op">&amp;</span> <span class="va">map_headernames</span><span class="op">$</span><span class="va">varlist</span> <span class="op">==</span> <span class="st">"x_anyother"</span><span class="op">]</span><span class="op">)</span></span>
<span> </span>
<span> <span class="va">info</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/cbind.html" class="external-link">cbind</a></span><span class="op">(</span></span>
<span>   <span class="fu"><a href="varinfo.html">varinfo</a></span><span class="op">(</span><span class="va">some</span>, info <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">'api'</span>, <span class="st">'csv'</span>, <span class="st">'acs'</span>, <span class="st">'varlist'</span><span class="op">)</span><span class="op">)</span>, </span>
<span>   usastats <span class="op">=</span> <span class="va">some</span> <span class="op"><a href="https://rdrr.io/r/base/match.html" class="external-link">%in%</a></span> <span class="fu"><a href="https://rdrr.io/r/base/names.html" class="external-link">names</a></span><span class="op">(</span><span class="va">usastats</span><span class="op">)</span>, </span>
<span>   statestats <span class="op">=</span> <span class="va">some</span> <span class="op"><a href="https://rdrr.io/r/base/match.html" class="external-link">%in%</a></span> <span class="fu"><a href="https://rdrr.io/r/base/names.html" class="external-link">names</a></span><span class="op">(</span><span class="va">statestats</span><span class="op">)</span><span class="op">)</span></span>
<span> <span class="va">info</span> <span class="op">&lt;-</span> <span class="va">info</span><span class="op">[</span><span class="fu"><a href="https://rdrr.io/r/base/nchar.html" class="external-link">nchar</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/paste.html" class="external-link">paste0</a></span><span class="op">(</span><span class="va">info</span><span class="op">$</span><span class="va">api</span>, <span class="va">info</span><span class="op">$</span><span class="va">csv</span>, <span class="va">info</span><span class="op">$</span><span class="va">acs</span><span class="op">)</span><span class="op">)</span> <span class="op">&gt;</span> <span class="fl">0</span>, <span class="op">]</span></span>
<span> <span class="va">info</span></span>
<span>  <span class="op">}</span> <span class="co"># }</span></span>
<span> </span></code></pre></div>
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